مشخصات مقاله:
عنوان فارسی مقاله:
برآورد ته نشست پس از روانگرایی خاک برای سازه های ساخته شده بر روی فونداسیون های سطحی
عنوان انگلیسی مقاله:
Estimation of settlement after soil liquefaction for structures built on shallow foundations
کلمات کلیدی مقاله:
تبدیل به مایع، توافق، ویسکوزیته
کلمات کلیدی انگلیسی:
Liquefaction – Settlement – Viscosity
مناسب برای رشته های دانشگاهی زیر:
مهندسی عمران
مناسب برای گرایش های دانشگاهی زیر:
ژئوتکنیک، سازه
وضعیت مقاله انگلیسی و ترجمه:
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فهرست مطالب:
Abstract
Keywords
1. Introduction
2. Equation of liquefaction-induced settlement
2.1. Sensitivity analysis
3. Three-dimensional finite element analysis
3.1. Numerical model setup
3.2. Model verification
4. Determination of viscosity from results of numerical analysis
5. Parameter correction
5.1. Amax
5.2. Time duration
5.3. Ground water level
5.4. Permeability effect
6. Comparison with other method
7. Summary and conclusion
Acknowledgement
References
قسمتی از مقاله انگلیسی:
1. Introduction
The Meinung earthquake occurred in southern Taiwan in 2016 and caused considerable loss of life and structural damages. Shallow foundations are widely adopted for residential buildings in central and southern Taiwan, and many of the buildings that tilted and settled following the earthquake had been built using this foundation type. The evaluation and prediction of liquefaction-induced settlements is thus necessary to enable shallow foundations to be efficiently designed. However, the procedure used to estimate liquefaction-induced settlement is fairly complicated. Previous studies on liquefaction-induced settlement can mostly be divided into four types, numerical analyses, empirical methods, experimental studies, and simplified methods, and these are briefly presented in the following paragraph. In early numerical analysis studies, an assumption of linear elasticity behavior was common. However, this assumption neglects the degradation of soil stiffness during liquefaction and causes an amplification of surface motion. Recently, the influences of soil non-linearity on soilstructure interactions have been investigated by many researchers (Shahir and Pak [1]; Dashti and Bray [2]; Karimi and Dashti [3,4]). However, to conduct a numerical analysis, it is necessary to have an appropriate simulation tool, an experienced operator, and a long period of computing time, which is not always practical. Empirical methods (Ishihara and Yoshimine [5]; Tsukamoto and Ishihara [6]) for estimating liquefaction-induced settlement is based on free field results, which means that the effects of structures are excluded, even though liquefaction-induced settlement has been found to be associated with the width and weight of foundations (Yoshimi and Tokimatsu [7]; Liu and Dobry [8]; Dashti et al. [9,10]). Studies that have conducted experiments (Yoshimi and Tokimatsu [7]; Liu and Dobry [8]; Dashti et al. [9,10] and Elgamal et al. [11]) using physical modeling tests (centrifuge test and shaking table test) provide valuable information, but it is too costly to conduct such tests for every project. Furthermore, there are no current, widely accepted, simplified methods are available for estimating liquefaction-induced settlement.